IPA: /ˌʌnhaɪˈdʒiːnɪk/
KK: /ʌnhaɪˈdʒinɪk/
Not clean and not following good health practices, which can lead to illness or infection.
The kitchen was in an unhygienic state, with food left out and dirty dishes piled up.
Comparative: more unhygienic
Superlative: most unhygienic
Unhygienic → It is formed from "un-" (meaning not) and "hygienic" (from Greek "hygieinē", meaning healthful or sanitary). The word "unhygienic" means not healthful or not sanitary, indicating conditions that are unhealthy or dirty.
Think of 'not' ('un-') being added to 'healthful' ('hygienic') — that's why unhygienic means something that is not clean or healthy.